John Butler joined National Criminal Defense Group, P.A. in December 2015, as the firms 'Of Counsel' in Texas.  He handles firms federal practice in all federal jurisdictions in Texas.

John attended the University of Cincinnati from 1969-1973 and graduated with a Bachelor of Arts degree with a dual major in Mathematics and Economics. After graduation, he moved to Houston to work in the oil business. He began as a computer programmer trainee, and later worked as a systems programmer, systems analyst, and network systems specialist.

In 1984, John moved to Austin and worked for Motorola ™ and later for the Texas Comptroller. He gave up working with computers in 1989 to enroll at the University of Texas Law School. There, he served as editor of the American Journal of Criminal Law and appeared in court representing criminal defendants as a student attorney in the Criminal Defense Clinic. He also represented Texas in the national criminal mock trial competition at the University of Chicago School of Law. These experiences confirmed his decision to represent those accused of crimes, which he has done since graduation in 1992.